Journal of the Franklin InstituteFranklin Institute, 1843 Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-1859. cf. Index to v. 1-120 of the Journal, p. [415] |
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Page 2
... effect of which is rapidly increased with the thickness of the latter , whence arises the necessity of introducing it into the calculations . In giving the solution which specially refers to the case of demirevetments , Col. Audoy has ...
... effect of which is rapidly increased with the thickness of the latter , whence arises the necessity of introducing it into the calculations . In giving the solution which specially refers to the case of demirevetments , Col. Audoy has ...
Page 16
... effect in both cases , let us suppose two engines , A and B , each of 12 tons weight in running order , with cylinders , boilers , and driving wheels of the same dimensions , and performing the same amount of duty , on two roads of ...
... effect in both cases , let us suppose two engines , A and B , each of 12 tons weight in running order , with cylinders , boilers , and driving wheels of the same dimensions , and performing the same amount of duty , on two roads of ...
Page 52
... effect so important a purpose , must be received with approbation , both by the government and the country . The principal , if not the only , means by which that security can be endangered , arises from the calamity of a fire occurring ...
... effect so important a purpose , must be received with approbation , both by the government and the country . The principal , if not the only , means by which that security can be endangered , arises from the calamity of a fire occurring ...
Page 54
... effect of several engines acting at the same time by the weaker and stronger impregnations , must be all - powersul , as may be easily conceived ; and no fire , whatever degree of head it may have previously attained , can resist the ...
... effect of several engines acting at the same time by the weaker and stronger impregnations , must be all - powersul , as may be easily conceived ; and no fire , whatever degree of head it may have previously attained , can resist the ...
Page 56
... effect . If the increased expense of the new plan be estimated , it will be found insignificant , compared with the benefit it will confer , and the innumerable evils and calamities which will be prevented . Taking the average of the ...
... effect . If the increased expense of the new plan be estimated , it will be found insignificant , compared with the benefit it will confer , and the innumerable evils and calamities which will be prevented . Taking the average of the ...
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Common terms and phrases
acid action advantage amount appears applied average axle become body boiler calculated carriages carried cast cause cent Clear Cloudy color common compared consequence considerable considered construction contained continued copper cost course diameter direction distance earth effect employed engines equal exhibited expense experiments fact feet force four friction give given greater ground half heat important inches increase iron laid lead length less light load machine manner material means metal mile minute mode motion moulding nearly necessary object observed obtained passed pattern pavements Philadelphia piece plate practice present pressure produced proportion quantity rails railway reference remark resistance road sand side square steam stone sufficient supposed surface taken thickness tion wall weight wheels whole yard
Popular passages
Page 206 - ... necessary for their preservation, and in such manner as shall be conducive to a beneficial and favorable display thereof, the models and specimens of compositions and of...
Page 354 - If it is discontinued, provided it has been once in public use, and the recollection of it has not been altogether lost — if it has been once publicly used, it will be sufficient to invalidate the letters patent, although the use may be discontinued at the time when the patent was granted.
Page 185 - Experiments and observations made with the view of improving the art of composing and applying calcareous cements...
Page 285 - I conceive, right to add, that in all cases, even though the composition of the water seems to bring it within the conditions of safety now stated, an attentive examination should be made of the water after it has been running for a few days through the pipes ; for it is not improbable that other circumstances, besides those hitherto ascertained, may regulate the preventive influence of the neutral salts.
Page 318 - Scotland, for his Invention of certain improvements in the means and machinery for deepening and excavating the beds of rivers, removing sandbanks, bars, and other obstructions to navigation.
Page 145 - The Committee on Science and the Arts constituted by the Franklin Institute of the State of Pennsylvania, for the promotion of the Mechanic Arts, to whom was referred for examination a Solar Compass, invented by WM.
Page 136 - ... will prevent the metal from running away, and in a few minutes it will cool and take the impression, without the slightest injury to the paper from which it was taken.
Page 28 - ... of an engineer, in regard to some of the general principles. He should accommodate a new line of road to local circumstances, so far as could be without superseding public advantages. It would be ridiculous to follow the old Roman fashion, on the mathematical axiom that a straight line is the shortest that can be drawn between two points. This would not make the most commodious road — hills must be avoided, towns must be resorted to, and the sudden bends of rivers must be shunned. It is not...
Page 206 - And be it further enacted. That it shall be the duty of the Commissioner to cause to be classified and arranged, in such rooms or galleries as may be provided for that purpose, in suitable cases, when necessary for their preservation, and in such manner as shall be conducive to a beneficial and favorable display thereof...
Page 355 - ... by sixteen iron screws four and a half inches in diameter. This platform has several shores on its surface, which were brought to bear equally on the vessel's bottom, to prevent her from canting over on being raised out of the water. About thirty men...